DataTable或DataSet的XML反序列化

Question

I have the following XML:

     <NewDataSet>
        <xs:schema id="NewDataSet" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
          <xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:MainDataTable="Data" msdata:UseCurrentLocale="true">
            <xs:complexType>
              <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element name="Data">
                  <xs:complexType>
                    <xs:sequence>
                    </xs:sequence>
                  </xs:complexType>
                </xs:element>
              </xs:choice>
            </xs:complexType>
          </xs:element>
        </xs:schema>
     </NewDataSet>

I know this was created by serializing a DataTable with new XmlSerializer(typeof(DataTable)).Serialize(writer, (DataTable)myDataTable); .

The schema as well as the actual data can be different in them.

I need to deserialize it, and tried the following:

reader.ReadStartElement("NewDataSet");
var dataSet = (DataTable)new XmlSerializer(typeof(DataTable)).Deserialize(reader);
reader.ReadEndElement();

and also:

reader.ReadStartElement("NewDataSet");
var dataSet = (DataSet)new XmlSerializer(typeof(DataSet)).Deserialize(reader);
reader.ReadEndElement();

All I got was

System.InvalidOperationException was unhandled Message=There is an error in XML document (26, 14). Source=System.Xml

InnerException:

"http://www.w3.org/2001/XMLSchema'> was not expected."

How can I deserialize that thing?

Answer 1

Managed to solve it. Seems like when we directly read to an existing DataSet using its ReadXml() method, it just works.

var dataSet = new DataSet();
dataSet.ReadXml(reader);

Now I can reach the table as dataSet.Tables[0]

Answer 2

I can't really provide you with sample code as I don't have context to the rest of your code.

Look at the documentation to XmlSerializer.Deserialize at: http://msdn.microsoft.com/en-us/library/system.xml.serialization.xmlserializer.deserialize.aspx and notice the different ways to initalize it.

Your reader should be at the beginning of the stream, which it is not after you called

reader.ReadStartElement("NewDataSet");

Simply don't begin reading the XML and just pass Deserialize your reader. Even easier you can just pass it the file/memory stream directly.